Piston-ring for internal-combustion engines.



E. H. OBERTOP. PISTON RING FOR INTERNAL COMBUSTION ENGINES. APPLICATIONFILED NOV. 19. 19:1.

L293,61? Patented Feb. 4, 1919,

7 3 i Z0 I? I 6 W Jfivenor fizari H flierz op erm ne EAR-L H. OBERIOP,OFTONOIPAH, NEVADA.

PISTON-RING FOB INTERNAL-COMBUSTIONENGINES.

Application. filed Hovember 19, 1917.

To all venom. it may concern:

Be it known that I, EARL H. OBnnToP, a

eitizen of the l nited States. residing at" lonopah. county ot' Nye.State of Nevada. have invented. new and useful improveminds inPiston-Rings for Internal-Conibustion llngines, of which the followingis av specification.

The present invention relates to improvements in packing ringrs forinternal combustion engines of substantiall the same typeas illustratedand deseribed in my Patent No. 1.179333. issued April 11th, 1916, and aprime object thereof is to provide a segmental spring actuated packingring that will perlectlv equalize the expansion of the ring segments sothat they will absolutely conform to the cylinder bores and prevent theescape or leakage of gases due to the compression or explosive stroke.

A further object of my invention is to provioo a novel form of pistonpacking rings in which the expansiblo members may be readil inserted,and which may be readily removed therefrom when. for any cause. they arerendered inoperative.

A still further and important object of my invention is to provide apistonringr eonslruction in which the segmental portions of theassembledring when in place on a piston, will not move circumt'erentially,whereby to prevent a registration of the various joints of the ringduring an operation of the piston and permitting a leakage, of gases.

ecomplish the above objects by means of the device described herein andillus- --trated in the accompanying drawing", in

engine cylinder showing in side elevation at piston equipped with myresilient ring construction.

Fig. is a plan view of my improved pistor ring. v a sice elevation of anassembled rin line. 4 is a section taken on line i -4 2. r I Fig. 5 isan enlarged detail of a fragmentary section of a piston, showing aseetional portion of a ring-mounted in the piston groove.

F G and 7 are detail perspective views of ring sectionsillustratingthepositions of the sections relative to each other when assembled.

specification of Letters Patent.

i atented Feb. 1 1919.

Serial No. 202,856.

Referring to the drawing, 5 designates an engine cylinder of-the usualtypo common to explosive engines. (5 a piston disposed therein providedwith packing rings 7 and 8. and the usual piston rod The rings aredisposed in the annular peripheral grooves 10 on the surface 01 thepiston. Rings '2' and 8 consist, as shown, of two halves 12, 13, and 14,15. with spaces 16 and 17 between the abuttingends of the segments,thereby permitting expansion and contraction of the ring.

, The segmental portion 12 of ring 7 is'provided on its upper peripheraledge with a horizontally disposed flange 8. cut away as at 10 adjacentits ends. as clearl shown in Fig. 6 of the drawings. its compl'einentalsegment 13 is similar in configuration to segmental portion 12, exceptthat it is pro vided on its lower peripheral edge with a horizontallydisposed flange 20 which is cut-away from the ends of the segment thesame distance as the ends of flange 18 on see'l'uontal portion 12.function of these flanges on the ring segments 12 and 13 will be morefully disclosed hereinafter.

The inner peripheral surface of each seg; mental portion of ring: 7provided -with a plurality of recessed portions 21. as elearl'}, shown.in the various figures of the drawing, and more particularly in Fig. 2;the verti.- call v disposed walls of the recesses forming shouldersagainst which the endsot the segmental sprin membersQS bear, as elearlyshown. in Fig. '2 oi. the drawing. These recessed portions 21'.correspond in depth to the thickness of the spring members 23 so thatwhen the rings are in place in the peripheral. grooves 10 of the pistonthey The purposes and" will snugly fit, the resiliency of the springtions of the ring segments so that they will conform closely to the.cylinder bore as heretofore set forth.

Piston ring R, as heretofore noted, is Comassembled as clearly shown inFigs. 2 and 8 of the drawing, they will present an apparently solidring. By providing flanges havin abutting ends on ring member 7 andprovi ing the abutments on ring member 8,

all movement of the segmental portions of the ring circumferential-11ywill be prevented so that the joints between the segmental. portionswill neverregisten thus preventingany accidental leakage of gases whenthe engine isin operation.

' t will be further noted that the ring can be easily assembled and willbe held in its assembled position by virtue of its peculiar structure.The resilient segmental s ring members 23 tend to force the segmentaring portions 12 and 13 outwardly and perfectly equalize the pressurethereon, while the segmental ring members 25 and 26 tend to hold thering together and their .abutments preventing a'ny circumferentialmovement.

From the above it will be noted that I have produced a piston packingring that will absolutely accommodate itself to any wear in thecylinder, whether it is worn simply larger and remains perfectlycircular in section, or has worn into an irregular shape.

What I claim is: 4 1. A. piston ring comprising a rigid annu larlyrabbeted ring composed of two-like segments, a ring composed of two likereposed of two complemental se ,silient se ents dis osed in the rabbetof said rigi segmenta ring, said rigid ring of said segments adjacenttheir ends, an a ring composed of two segments provided on its upper andlower edges with abntments adapted to encompass said first named ring,the abutments of the second named ring engagi'n the abutments formed onthe first name ring, whereby to prevent circumferential movement of thering segments when assembled. v

3', A piston ring, comprising a ring com inner eripheral surface of sairing being provi ed with a plurality of recesses, a resilient memberdisposed; in each of said recesses, abutments rormed on the upper andlower edges of said segments adjacent their ends, and a ring composedoftwo segments provided-on its up or and lower edges with abutments adato to encompass said first named ring, t e .abutments of the se'coiidnamed ring engaging the abutments formed on the first named ring,whereby to prevent circumferential movement of thering segments whenassembled o i In witness that I claim the foregoing I have hereuntosubscribed day of November, 1917,

amit, onnn'ror.

cuts, themy name this 1st-

